# Predicting Annual Precipitation.

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The annual precipitation amounts in a certain mountain range are normally distributed with a mean of 88 inches, and a standard deviation of 10 inches. What is the likelihood that the mean annual precipitation during 25 randomly picked years will be less than 90.8 inches?

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This solution shows step-by-step calculations to determine the likelihood that the mean annual precipitation during 25 years is less than 90.8 inches.

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The mean of 25 random years is less than 90.8 is equal to saying tha the sum of 25 random years is less than 2270.

In other words, we have 25 normal distributions with mean = 88 and variance = 100. We ...

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